Enhanced thermoelectric performance in Mg<sub>3+x</sub>Sb<sub>1.5</sub>Bi<sub>0.49</sub>Te<sub>0.01</sub><i>via</i> engineering microstructure through melt-centrifugation
Melis Özen, Mujde Yahyaoglu, Christophe Candolfi, Igor Veremchuk, Felix Kaiser, Ulrich Burkhardt, G. Jeffrey Snyder, Yuri Grin, Umut Aydemir
Abstract
By applying the melt-centrifugation, porosity and dislocations are introduced in the microstructure of the n-type Zintl phase Mg<sub>3+x</sub>Sb<sub>1.5</sub>Bi<sub>0.49</sub>Te<sub>0.01</sub>leading to significantly low <italic>κ</italic><sub>l</sub> (∼ 0.33 W m<sup>−1</sup> K<sup>−1</sup> at 723 K) and enhanced <italic>zT</italic> (∼ 1.64 at 723 K).
Topics & Concepts
MicrostructureMaterials scienceThermoelectric effectAnalytical Chemistry (journal)CrystallographyMineralogyMetallurgyChemistryPhysicsThermodynamicsChromatographyAdvanced Thermoelectric Materials and DevicesThermal properties of materialsThermal Radiation and Cooling Technologies